Check for bad lubrication of clutch pedal shaft.

Apply the grease or repair it.

Check for a clogged pipe.

Inspect or replace the clogged pipe.

Check for a stuck concentric slave cylinder.

Replace the concentric slave cylinder. Refer to Clutch Concentric Actuator Cylinder Replacement.

Check for binding in the linkage.

Lubricate and free-up the binding linkage.

Check for a worn driven plate.

Replace the worn driven plate.